Extremely disappointed by global account

Opened a global account before my international trip, transferred funds to the global account(bought dollars),notified the bank of planned travel and all was good. I got to the international slow lounge and was told I could not get in as my card was not authorised, I try get myself food paying using the same card and transaction got declined.

I try to transfer funds and I am told it will take at least 24 hours for the funds to reflect.

Been calling FNB to sort this mess out and no one is willing to assist, I only get transferred from one consultant to the next without any assistance,

Been a client for so long and this service left a bad taste in my mouth, one would have to move banks now